1. Wikipedia. Viral Hepatitis. http://enwikipedia.org/wiki/viral_hepatitis . Accessed on 3 March 2–14.
2. Bader TF. Hepatitis A vaccine. Am J Gastroenterol. 1996;91:217–22.
3. Brown GR, Parsely K. Hepatitis epidemic in the elderly. Southern Medical Journal. website. http://www.medscope.com/viewarticle/444318 .
4. Communicable Diseases Intelligence Vol. 31. Supplement, June 2000.
5. Marcus EL, Tur-Kaspa R. Viral hepatitis in older adults. JAGS. 1997;45(6): 755–63.